Today I made over 500++ day trades average size was 3000 to a few (My sale after scaling up) 40,000. Was ultra liquid, 400 million shares traded in volume. I exceeded a 1,000,000 shares of churning, who has the best price plus a chance to get ECN Rebates? I would like negative commission like IB does with my option trades. In the old days with MyTrack I paid $9 in commission minus $.005 x 30,000 shares making my commission -$125.00. ECN fees have dropped, do they pay $.0025 or $.002 now? It's been awhile since I played the Rebate game.